and on i-75 from pittsburgh to indianapolis. wet on each end on i-95 and on i-10 along the gulf coast. flash flooding on i-15, 25 and 40 in the rockies. >> if you are flying today, expect airport delays in denver, chicago, detroit, new york, philadelphia, washington and new orleans. >>> and now, to the latest warning about dietary supplements. americans shelled out $27 billion on them last year. but "consumer reports" has just singled out 12 ingredients said to be linked to a string of health problems, from cancer to kidney damage. here, now, is lisa stark. >>> reporter: dietary supplements are a booming business. 150 million americans take them, but now a warning from "consumer reports" about ingredients that may hurt, not help. >> with the dozen supplements that we've identified, we think it's all risk and no benefit. >> reporter: what the magazine calls the dirty dozen are marketed for everything from weight loss to coughs to anxiety and depression and a host of other ailments. but "consumer reports" says each can have seriou